Directions:1. Preheat oven to 350 degrees. Grease sides and bottom of 9x13 pan. Flour it lightly.2.. In large bowl, add cake mix, eggs, water, and vegetable oil (exactly as you would if you were making a plain yellow cake). Beat together for about a minute to fully combine.2. Add pumpkin and cinnamon. Beat for another minute or so until fully mixed.3. Pour batter into prepared pan. Bake for 32-35 minutes or until a cake tester comes out clean.4. Cool and enjoy!